... operating period. Large LCD Display screen.RS6201 series include the following three types of Optical Power Meter, which divided ... ,780,850,980,1060nm850,980,1310,1490,1550nmOptical Power Range+3~-70dBm or+10~-70dBm(Optional)+26~- ... Versatile Connector(Optional for SC, ST)InterfaceRS232(Optional)Power Supply8.4V Battery or DC12V AdapterBattery Operating Period20h minOperating ...